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Influence of the Crystal Structure Defects on Scintillation Properties

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Inorganic Scintillators for Detector Systems

Part of the book series: Particle Acceleration and Detection ((PARTICLE))

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Abstract

This chapter discusses the influence of different crystal structure defects on the scintillation crystal conversion efficiency, energy transfer, luminescence yield and light collection, as well as on their radiation hardness. During the synthesis of crystalline media defects are inevitably produced and are classified according to their size and shape: point, linear and three-dimensional defects. Another type of defects are produced in the scintillators under ionizing radiation. Charged particles as light as electrons create charge defects in crystals. Heavier charged particles like protons, α-particles, hadrons and nuclear fragments loose much more energy when colliding with the lattice ions, resulting in relatively large damaged area of several crystallographic cells. The impact of these radiation induced defects on the radiation damage is presented, in particular on the scintillation efficiency and on crystal transparency. The dynamic of these effects is discussed in detail, for the damage building as well as for its recovery. The chapter concludes with practical considerations on how to improve scintillator radiation hardness.

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(2006). Influence of the Crystal Structure Defects on Scintillation Properties. In: Inorganic Scintillators for Detector Systems. Particle Acceleration and Detection. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-27768-4_4

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